cpufreq_curr_sysctl: memory allocation
Andriy Gapon
avg at freebsd.org
Sun Jun 20 15:59:42 UTC 2010
I noticed that cpufreq_curr_sysctl performs a substantial memory allocation and
deallocation on each call. Its size is CF_MAX_LEVELS * sizeof(*levels), which
is ~24KB. This happens even for read-only calls to just query current level.
And such calls happen quite frequently when powerd is running.
I think that this is an unnecessary and avoidable load for VM system.
Couldn't a buffer be preallocated in sc and re-used for the calls?
Even if not, for some reason, then wouldn't it be better to have a dedicated uma
zone for that rather than doing malloc+free?
--
Andriy Gapon
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